Personally, if a model looked THIS horrible after a conversion, I'd include SOME kind of shading. It seriously looks like a weak shade from white-to-gray with almost no definition. However, it COULD be the ENB you're using. Maybe include more than one screen shot from more than one enb? (wont rate)

Cool car dude! I like german style, too bad there aren't more of them. Thing tho, Lambo doors are horrible! And it needs some improvment.. I hope to see a v2 and if so, keep the wheels but take away those ugly * lambo doors! 7/10